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Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases1 Mark
MCQ

When you exhale, the diaphragm.

  • A
    Relaxes and flattens.
  • B
    Relaxes and arches.
  • C
    Contracts and flattens.
  • D
    Contracts and arches.
✓

Answer

  1. Relaxes and arches.

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